1638484701 has 16 divisors (see below), whose sum is σ = 2643606144. Its totient is φ = 881201664.

The previous prime is 1638484691. The next prime is 1638484709. The reversal of 1638484701 is 1074848361.

It is not a de Polignac number, because 1638484701 - 2⁵ = 1638484669 is a prime.

It is a super-2 number, since 2×1638484701² = 5369264230822118802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638484709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2294440 + ... + 2295153.

It is an arithmetic number, because the mean of its divisors is an integer number (165225384).

Almost surely, 2^1638484701 is an apocalyptic number.

It is an amenable number.

1638484701 is a deficient number, since it is larger than the sum of its proper divisors (1005121443).

1638484701 is a wasteful number, since it uses less digits than its factorization.

1638484701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4589620.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1638484701 is about 40478.2003181960. The cubic root of 1638484701 is about 1178.9103943940.

The spelling of 1638484701 in words is "one billion, six hundred thirty-eight million, four hundred eighty-four thousand, seven hundred one".